>2xnbA (A:) observed residues (from ATOM records)
menfqkvekigegtygvvykarnkltgevvalkkirldtegvpstaireisllkelnhpn
ivklldvihtenklylvfeflhqdlkkfmdasaltgiplpliksylfqllqglafchshr
vlhrdlkpqnllintegaikladfglarafgvpvrtythevvtlwyrapeillgckyyst
avdiwslgcifaemvtrralfpgdseidqlfrifrtlgtpdevvwpgvtsmpdykpsfpk
warqdfskvvppldedgrsllsqmlhydpnkrisakaalahpffqdvtkpvphlrl